MILFORD - The family of a local teenager who fatally stabbed a female classmate to death at Jonathan Law High School three years ago after she rebuffed his invitation to the prom has tentatively agreed to pay a settlement to the mother of the victim.

“I can confirm settlement discussions are proceeding,” said Edward Gavin, the lawyer for Christopher Plaskon and his parents, David and Kathleen Plaskon on Thursday. “Ultimately, in any case of this type, a settlement must be approved in probate court.”

Christopher Plaskon was sentenced June 7, 2016, to 25 years in prison after he pleaded no contest to murder for stabbing 16-year-old Maren Sanchez to death on April 25, 2014, with a steak knife in the hallway of the high school.

A week later Sanchez’s mother, Donna Cimarelli-Sanchez filed suit in Superior Court here against the Plaskon family and the Board of Education seeking damages for her daughter’s death.

The case against the Board of Education is scheduled to go to trial in May 2018.

Earlier this week however, the lawyers for Cimarelli-Sanchez asked a judge to modify the case schedule because they had worked out a settlement with the Plaskons.

“Plaintiff has worked out a settlement with three of the five defendants: Christopher Plaskon, David Plaskon and Kathleen Plaskon. That settlement is pending in probate court, with a hearing scheduled for September 19, 2017, and will require some time to complete even after the probate hearing, assuming probate approval of the settlement is granted,” their motion states.

Cimarelli-Sanchez’s lawyer, David Golub, did not return calls and emails for comment.

Sanchez was stabbed to death on the day of the Law High School junior prom.

Security video showed Plaskon arriving at school early that morning and wandering about the hallways, waiting for Sanchez. When he met up with her, Plaskon followed Sanchez into a stairwell and, out of sight of the cameras, he stabbed her in the chest and neck.

The lawsuit states in November 2013, Maren Sanchez reported to the high school guidance department her concern that Plaskon was emotionally disturbed and was threatening to commit suicide or acts of serious self-harm by cutting himself with a knife, and that she believed it was important for high school personnel to help Plaskon to prevent him from engaging in potentially violent conduct dangerous to himself or to others.

Plaskon was absent from school for a week after Sanchez's report about him to the school guidance counselor, then returned to school and continued to engage in self-destructive behavior, including cutting himself with a knife, and began bringing a knife to school with him, the suit states.

Plaskon's guidance counselor failed to advise the principal, school security or others in the school administration or the state Department of Children and Families of Sanchez's report, in violation of mandatory school policies and state law, the lawsuit states.

The lawsuit further alleges Plaskon's parents were aware that their son was engaging in self-destructive conduct with knives that was potentially dangerous to himself and others and failed to obtain proper medical treatment for him, nor did they try to prevent him from having access to knives.